Classification Of Network.

Explain Network Types Based On Geographical Network.

Explain LAN.

 

•    LAN is stand for local area network.
•    It supplies networking capability to a group of computers in close proximity to each other such as in an office building , a school or a home.
•    LAN is useful for shearing resources like files , printers ,games or other applications.
•    LAN connects network devices over a relatively short distance. A networked office building, school or home contains a single LAN though sometimes one building will contains small span a large size business today use LANs , which makes it easy for employee to share information.
•    The defining characteristics of LANS, in contrast to wide area networks, include their small geographic area, and non-inclusion of leased telecommunication lines.
•    Most local area network are built with relatively inexpensive hardware such as ethernet cables, network adapter and hubs.
•    Specialized operating system software may be used to configure a local area network for example most flavors of microsoft windows provide a software package called internet connection shoring (CICS) that support controlled access to LAN resources.
•    The term LAN party refers to a multiplayer gaming event where participants bring their own computers and build a temporary LAN.
•    Local area network may serve as few as two or three users or as many thousands of users.
•    Most LAN connect workstations and personal computers. Each node in a LAN has its own CPU with which it executes programs but is also be able to access data and devices anywhere on the LAN. This means that many users can share expensive devices, such as laser printers as well as data. User can also use the LAN to communicate with each other by sending e-mail or enaging in chat sessions.
•    LANS are capable of transmitting data at very fast rates, much faster than data can be passed over telephone line, but the distance are limited and there is also a limit on the number of computers that can be attached to single LAN.
Advantages
•    File can be stored on a central computer allowing data to be shared throughout an organisation.
•    Files can be backed up more easily when they are scattered rather than when they are scattered across a number of independent workstation.
•    Network also allow security to be established ensuring that the network users may only have access to certain files and applications.
•    Software and resource can be centrally managed.
•    Expensive devices such as laser printer or scanners can be shared.
•    User can access their files from any workstation.
Disadvantages
•    A good LAN is required power to be o all the time.
•    Security reason:-
         Each computer and device become another point of entry of undesirable.
•    Networks are difficult to set up and need to be maintained by skilled technicians.
•    If files server develops a serious fault, all the users are affected.
•    Area covered is limited.
•    A lot of times a network shares one internet connection. If all computer running at once, can reduce speed for each.
•    Frustration if having a problem setting up.


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by Firdosh Jahan   Memon  in Networking  on 7/6/2015 5:42:29 AM  


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